Retrieve per host storage usage from QuotaManager.

webkit/quota/quota_manager.h

Index: webkit/quota/quota_manager.h
diff --git a/webkit/quota/quota_manager.h b/webkit/quota/quota_manager.h
index 255c0e63426e24d29da9bcc4f7bdda2a2d3e4314..2d0de6a9d9b9672ee568d35eda2afc5de3e9afa1 100644
--- a/webkit/quota/quota_manager.h
+++ b/webkit/quota/quota_manager.h
@@ -74,6 +74,16 @@ class QuotaEvictionHandler {
       GetUsageAndQuotaForEvictionCallback* callback) = 0;
 };
 
+struct UsageInfo {
+  UsageInfo(const std::string& host, StorageType type, int64 usage)
+      : host(host),
+        type(type),
+        usage(usage) {}
+  std::string host;
+  StorageType type;
+  int64 usage;
+};
+
 // The quota manager class.  This class is instantiated per profile and
 // held by the profile.  With the exception of the constructor and the
 // proxy() method, all methods should only be called on the IO thread.
@@ -97,6 +107,9 @@ class QuotaManager : public QuotaTaskObserver,
   // Returns a proxy object that can be used on any thread.
   QuotaManagerProxy* proxy() { return proxy_.get(); }
 
+  // Called by clients or webapps. Returns usage per host.
+  void GetUsageInfo(GetUsageInfoCallback* callback);
+
   // Called by clients or webapps.
   // This method is declared as virtual to allow test code to override it.
   // note: returns host usage and quota
@@ -188,6 +201,7 @@ class QuotaManager : public QuotaTaskObserver,
   class UpdateModifiedTimeTask;
   class GetModifiedSinceTask;
 
+  class GetUsageInfoTask;
   class UsageAndQuotaDispatcherTask;
   class UsageAndQuotaDispatcherTaskForTemporary;
   class UsageAndQuotaDispatcherTaskForPersistent;